An automatic ash supply device and control method for well cementing equipment

Abstract

The invention provides an automatic ash supply device for cementing equipment. The ash supply pipeline in the device and the No. 1 remote control valve, the No. 1 cement ash tank is connected with theNo. 2 cement ash tank, The bottom ends of the No. 1 cement ash tank and the No. 2 cement ash tank are connected with the No. 4 remote control valve and the No. 3 remote control valve by pipelines, the No. 3 remote control valve and the No. 4 remote control valve are connected with the solid flowmeter and the constant pressure tank, the constant pressure tank is connected with the No. 2 remote control valve by pipelines, and the other end of the No. 2 remote control valve is connected with the cement slurry preparation mechanism by pipelines. The method is carried out according to the following steps: 1, parameter setting and device startup; 2, that operation and monitor of the device; 3, monitoring the operation of the device; 4. Device Off. As that constant pressure tank and the solid flowmeter are adde to the device, the controllable automatic pouring function of the ash supply system can be realized, the influence caused by human factor in the manual pouring process can be reduced,and the reliability of the ash supply system can be improved.

Description

technical field [0001] The invention relates to the fields of petroleum machinery and workover and well completion equipment, in particular to an automatic ash supply device and control method for well cementing equipment. Background technique [0002] As the pillar industry of our country, the petrochemical industry has a long production line and a wide range of fields, and it continues to develop with the growth of the social economy. Well cementing, as one of the important links in the process of oil and gas well construction, is a hidden downhole operation project involving a wide range of areas, high risk, high operation requirements and strong technicality. The quality of cementing directly affects whether the well can continue drilling, whether it can be produced smoothly, the life of oil and gas wells, and the recovery rate of oil and gas reservoirs. Cementing equipment, as a high-tech petroleum equipment, has a great impact on the efficient development of oil and g...

AI Technical Summary

Problems solved by technology

[0004] Although after nearly half a century of development, most cementing technologies have been continuously improved and developed, but the automation control of cementing equipment still has problems such as low engineering adaptability and difficult control of cement slurry preparation accuracy.

Through research and analysis, it is found that the main reason for these problems is that the cement ash used in the preparation of cement slurry cannot be continuously and stably supplied to the cementing equipment through the existing ash supply system. The ash tank is manually judged whether to dump the tank, and human factors have a great influence , resulting in the quality of the automatically prepared cement slurry cannot be guaranteed

[0005] At present, the conventional ash supply system cannot realize automatic tank dumping and stable ash supply mainly because of the following three points: 1. Lack of automatic tank dumping logic flow, automatic tank dumping steps, and unclear definitions; 2. Cement ash tanks cannot measure whether there is any remaining Cement ash, there is no basis for judging the process of automatic tank dumping; 3. There is no transitional equipment between the cementing equipment and the cement ash tank that can provide stable ash supply

[0006] With the gradual expansion of the scale of shale gas development, the limitations and deficiencies of the manual tank dumping and the inability to provide a stable ash source for the ash supply system have become increasingly apparent, making it increasingly difficult to adapt to the requirements of on-site operations; it is necessary to propose an automatic Tank dumping, an automatic tank dumping system that provides continuous and stable cement ash supply for cementing equipment, to meet increasingly stringent engineering needs and help shale gas to develop efficiently, safely and with high quality

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